Ramaswamy Akash, Mahabala Chakrapani, Basavaiah Sridevi Hanaganahalli, Jain Animesh, Chouhan Ravi Raj Singh
Department of Internal Medicine, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Department of Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Trop Parasitol. 2020 Jan-Jun;10(1):24-28. doi: 10.4103/tp.TP_71_18. Epub 2020 May 20.
This study aimed to identify asymptomatic malaria carriers and study the differences in local and migrant population in Mangalore.
This study was conducted using two-stage cluster sampling. In the first stage, wards were randomly selected. The sample size for each cluster (wards) was determined using the probability proportionate to size method. In the second stage, required number of households was selected using a simple random sampling technique from each cluster. From the selected clusters, samples from 140 participants were collected.
Of the 140 cases, 106 (75.7%) were male and 34 (24.3%) were female. Six cases (4.3%) of the 140 cases were positive for malarial parasites, of which gametocytes of were noted in three cases and schizonts of in three cases. From the total number of cases, 56 (40%) constituted the migrant population and the remaining 84 (60%) were the local population. All the six patients with asymptomatic carriers belonged to the migrant population.
A more sound malaria elimination strategy needs to be implemented, for which active surveillance for cases would form a backbone. This study shows that the migrant population seems to show a predilection for asymptomatic malaria, thus targeting malaria elimination programs to areas with a high migrant population would help.
本研究旨在识别无症状疟疾携带者，并研究芒格洛尔当地人口和流动人口的差异。
本研究采用两阶段整群抽样法。第一阶段，随机选择病房。每个整群（病房）的样本量采用规模比例概率法确定。第二阶段，从每个整群中使用简单随机抽样技术选取所需数量的家庭。从选定的整群中，收集了140名参与者的样本。
140例中，男性106例（75.7%），女性34例（24.3%）。140例中有6例（4.3%）疟原虫检测呈阳性，其中3例发现配子体，3例发现裂殖体。在所有病例中，56例（40%）为流动人口，其余84例（60%）为当地人口。所有6例无症状携带者均属于流动人口。
需要实施更完善的疟疾消除策略，对此病例的主动监测将构成其核心。本研究表明，流动人口似乎更易感染无症状疟疾，因此将疟疾消除项目针对流动人口多的地区将有所帮助。
